72 hr visa free to Beijing

I am flying from california arriving on sept 11 at 1130 pm(almost midnight sept 12. I am staying for 3 days and go to Manila on my next flight on sept 15 at 0100(after midnight). I plan to be at the airport already on sept 14 by 10 pm.Is this alright with the 72 hr free visit to Beijing? I will definitely be back at the beijing airport at 10 pm before the 0100 departure.
Thank you very much
Shirley